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E. O. LOPTUS ORE FEEDER.

No. 378,871. Patented Feb. 21, 1888.

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UNTTED STATES PATENT EDWABD C. LOFTUS, OF OAKLAND, CALIFORNIA.

ORE-FEEDER.

SPECIFICATION forming-part of Letters Patent No. 378,371, dated February21, 1888. Application filed January 26, 1887. Serial No. 225.560. (Nomodel.)

To all whom it may concern:

Be it known that I, EDWARD C. LoF'rUs, a citizen of the United States,residing at Oakland, Alameda county,and State of California, haveinvented new and useful Improvements in Ore-Feeders, of which thefollowing is a specification.

liIyinve-ntion relates to that class of machinery used to supply ore tobe ground to mills used for that purposeas pulverizers or the ordinarystamp-battcry-the object being to produce a feeder with few working orwearing parts, easy to remove and inexpensive to renew, yet positive inits action and capable of feeding wet and muddy ores, and even mudalone, if desired.

My invention is illustrated in the accompanying drawings, in which-Figure 1 is a frontelevation of the feeder. Fi g. 2 is a centralvertical section of the same, showing means for operating the plunger bythe tappet of a stamp-stein. Fig. 3 is a horizontal section of the sameon the line A B, Figs. 1 and 2, showing theinterior of the feeder and asoperated by a crank-shaft; and Fig. 4 is a detail view of an adjustablecrank and connecting-rod.

The same letters refer to similar parts throughout the several views. I

A A constitute the frame-\vork,of wood; B, the sheet-iron hopper inwhich the broken ore is deposited. Beneath this hopper is the feederproper, C, which consists of a box-like receptacle supported by theframe A. On the side next the pulverizcr or stamp-battery is theswinging door 1), and on the opposite side is the plunger,pivoted at itscenterF and adapted to be driven by the pulley G, crank H,and stud I.The outside of the plunger at J is curved in the arc of a circle struckfrom the pivot F as a center and fits snuglyin thecorrespondingly-shaped cheek-pieces K, so as not to allow any ofthematerial to work in between. The

plunger is shaped on its inner face in the form of two large curves, EL, which prevent the 5 ore from working from side to side and compel itto move forward as the plunger is oscillated and to pass under the doorD onto the apron M, and thence into the mill or stampbattery. I

It will readily be seen that it matters not what the nature of the oremay be -it must be forced forward toward the apron, this being the lineof least resistance.

The shaft 0 is secured to the frame at P in ordinary bearings and heldin place by the setcollar R is a hand-nut, which holds the crank-pin inthe slot of the pulley to regulate the stroke of the plunger. S arebolt-holes to hold the top plate to the bottom, they passso ing throughthe cheek-plates,and are shown in Fig. 1.

In Fig. 2 is shown another means ofoscillating the plunger,consisting ofthe Tshaped lever T, having the arms U V X and pivoted to 65 the frameA. The arm U has a forked lower end which straddles a stud similar tothe stud I, but on the opposite side of the plunger. As the arm V isstruck by the tappet on the stamp-stems sudden oscillating motion is im-70 parted to the plunger, and as the stamp is lifted the spring WV,acting on the arm X, restores the lever and plunger to their formerposition.

Having illustrated and described myiuven- 7 5 tion, what I claim as new,and desire to secure by Letters Patent of the United States, is-- In anore-feeder,the combination of the hopper, the feed-chamber, theoscillating double curved faced plunger, the central vertical 8o pivot,and means for oscillating the plunger, substantially as herein setforth.

EDWARD O. LOFIUS.

W'itnesses:

LOUIS P. WARDLE, F. P. LANGAN.

